Mark Serwotka – General Secretary of the Public and Commercial Services Union (PCS), which tweets as @pcs_union, indicates his resolve to fight for the future of our public services and to defeat austerity.

John McDonnell MP – main speech by the Labour MP for Hayes and Harlington, national chair of the LRC and of the Socialist Campaign Group of MPs, and prominent supporter of the Trade Union Co-ordinating Group (TUCG). John tweets as @johnmcdonnellMP.